Google Labs has just launched a new little site aimed at centralizing access to many Google services. The JavaScript/DHTML based portal allows visitors to select a Google service using a "Macintosh-Dock" type interface. Upon selecting an item from the "GoogDock", users are whisked away to the appropriate service site.
it's pretty cool, and if you want to get something like this running on windows you could try Y'z dock (suied by apple, development stopped) ; there are several alternatives, but they take too much RAMs ..

http://labs.google.com/googlex/

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google for Y'z dock, there's no official site.
6 days later
EDIT: apparently, it has been removed :?
The requested URL was not found on this server.
yeah, but google Labs is pretty cool!
yeah i heard it got removed becuase it was afraid to get sued by apple for using their icons